hard vs hardened

hard and hardened both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hard	No	Yes	No	Yes
hardened	No	Yes	No	No

hard (adjective)	hardened (adjective)
produced without vibration of the vocal cords	made hard or flexible or resilient especially by heat treatment
resisting weight or pressure	protected against attack (especially by nuclear weapons)
dispassionate	made tough by habitual exposure
(of speech sounds); produced with the back of the tongue raised toward or touching the velum	converted to solid form (as concrete)
(of light) transmitted directly from a pointed light source	used of persons; emotionally hardened
not easy; requiring great physical or mental effort to accomplish or comprehend or endure
being distilled rather than fermented; having a high alcoholic content
unfortunate or hard to bear
given to excessive indulgence of bodily appetites especially for intoxicating liquors
dried out
very strong or vigorous
characterized by effort to the point of exhaustion; especially physical effort

hard (adverb)	hardened (adverb)
with effort or force or vigor
to the full extent possible; all the way
slowly and with difficulty
causing great damage or hardship
with firmness
indulging excessively
earnestly or intently
with pain or distress or bitterness
very near or close in space or time
into a solid condition